Air register for furnaces



18, I w N 2,515,813

AIR REGISTER FOR FURNACES Filed Nov. 9, 1946 INVENTOR HUGH WIANTATTORNEY Patented July 18, 1950 UNITED STATES PATENT OFFICE AIR REGISTERFOR FURNACES Hugh wiant, Westfield, N. J.

: Application November 9, 1946, Serial No. 708,954

This invention relates to air registers for. furnaces of the typeemployed in industrial installations wherein relatively large quantitiesof fuel are burned, and the invention consists essentially of a deviceinserted through an opening in the furnace wall which is adapted tosupport the fuel burner and provide means for controlling the flow ofcombustion supporting air into the furnace.

One of the objects of the present invention is to provide an airregister of the above general type and for the specified purposes thatmay be completely assembled as a unit prior to the installation thereofin a furnace. Such an arrangement greatly facilitates installation of aregister and-the only operation necessary at the furnace is to attachthe register to thesupports therefor.

Another object of the invention is to provide an air register which hasmeans for holding the burner to be associated therewith in place atsubstantially the center of the register and without any appreciableobstruction, other than that of the burner itself, to the flow ofcombustion supporting air through the register.

Still another object of the invention is to provide a register whicheffects a more nearly complete mixture of the fuel with the combustionsupporting air whereby more complete and rapid combustion is possible.vSuch an arrangement tends to decrease the flames in the furnace wherebythe furnace may have a smaller combustion space.

Still another object of the invention is to provide an air registerhaving a minimum number of parts or components and particularly aminimum number of movable parts whereby adjustment and servicing of theregister is facilitated.

The above and further objects of the invention will be more apparenthereinafter in the following detailed description of a preferredembodiment thereof wherein reference is made to the accompanyingdrawings, in the latter of which: Fig. 1 is a vertical sectional viewtaken substantially through the center of an air register constructed inaccordance with the present invention;

Fig, 2 is a front end view partly in section of the register shown inFig. 1;

Fig. 3 is a sectional view taken substantially on,

line 3-3 of Fig. 1; and

Fig. 4 is a fragmentary detailed view of a part I of the front of theregister.

Referring to the drawings, the register includes a main cylindricalsection or tunnel, indicated generally by reference numeral II, which isinserted in the register.

1 Claim. (01. 15 -15) propriate size in the wall of a furnace. A furnacewall composed of the usual material is indicated by reference numeralI2, and the length of the tunnel I l is such that with the inner endsubstantially flush with the inside of the furnace wall, the outer endthereof will extend a considerable distance from the outside of thewall.

The tunnel II has formed on the outer end thereof a radially extendingflange I3 which is rectangular in shape, and bolts such as I4 extendinthrough the flange enable the tunnel to be secured to a pair of channelmembers IS. The channel members I6, one above and one below the tunnelIl, may also form a part of the furnace wall supporting structure, and aplurality of registers of the type shown in the drawings may be securedthereto by means of cap screws N, Fig.

2, is a cup-shaped cover, indicated generally by reference numeral I8,which has an end section [9 and a cylindrical section 2I havingsubstantially the same inside diameter as that of the tunnel I I. Thecylindrical section 2i of the cover I8 has a plurality of rectangularshaped openings or air ports 22 therein, and the end section 19 has aplurality of openings or ports 23 therein. The end section [9 also has acentral opening or bore 24 with a sleeve 26 formed integrally therewith.Among other things, the sleeve 26 provides an opening through which aburner, indicated generally by reference numeral 21, may be The burner21 may be of the type disclosed in my co-pending application bearingSerial No. 682,576, filed July 10, 1946.

The burner extends into the register so that the tip thereof, as shownin Fig. 1, is a, little short of the inner end of the tunnel and it isheld in p1ace with respect to the register by set screws such as 28through the sleeve 26.

The end section I9 of the cover It extends a slight distance beyond thecylindrical section 2| to form a retaining ridge 30 for a split sleeve29 surrounding the cylindrical section and located between the ridge andthe flange 3| by which the cover is attached to the tunnel I I. Thesplit sleeve 29 has a plurality of rectangular shaped openings or portstherein corresponding to openings 22 in the cylindrical section 2| ofthe cover. By

adapted for insertion through an opening of anrotating the sleeve 29around the cylindrical St l-1 3 tion 2|, the area of the openingsthrough both may be increased or decreased to control the amount ofcombustion supporting air flowing to means for rigidly connecting theends of the split sleeve.

The operating member 34 may be connected through a link 36, preferablyadjustable; to a suitably guided register operatingrod 31. Other similarlinks, such as 36a, connecting other register operating members, such as34a, to the rod 311 enable a plurality of "registers to be operatedsimultaneously.

Pivotally mounted on the inner end of the central sleeve 26 of cover I8is a disc member. 38 with openings 39 therein corresponding to theopenings 23 in the section I9 of the cover. Threaded into the disc38 andextending through one of the openings 23 in the cover I8 is a member 4|.By unloosening the member-M the disc 38 may be rotated to bring theopenings 39 therein into registry with the openings 23 in the cover, orto an intermediate position as shown in Fig. 4, and thereby providemeans for inserting a torch in the register to light the burner and toobserve the same.

Located inside the tunnel I 1 near the inner end thereof is a ring 42which, as shown in Fig. 1, slopes inwardly at an angle of approximately45 toward the central axis of the tunnel H. Next to the ring 42 andextending to the inner end of the tunnel I l is a ring of refractorymaterial 43. The inner diameter of the refractory ring 43 issubstantially equal to the inner diameter of the ring 42 and thereduction in diameter of the tunnel [I that is caused by the ring 42 andrefractory material 63 increases the velocity of the air passing throughthe tunnel and directs the same toward the center thereof and toward thetip of the burner 21.

Located on the inner side of the ring 42 in the tunnel I! are aplurality of angularly positioned fins 44. These fins impart a whirlingmotion to the air flowing through the tunnel H" whereby the air is morethoroughly mixed with the fuel projected from the burner tip. Inaddition to giving the combustion supporting air a whirlingmotion, thefins being next to the ring 42 and having an' edge anchored thereon asby welding are heated by the absorption of heat from the burner flame,and accordingly theair flowing past the fins is partially preheated; Thepreheating. or

the air is a material aid to combustion," par- 95 tha re t swea in c onf th Ps is obtained, resulting in the reduction of the space requiredfor combustion. Also, a register is provided which has a minimum numberof movable parts which may easily and readily be adjusted and whichreadily adapt themselves for simultaneous adjustment by a single controlmember when a plurality of such registers are employed in a furnace.

While the invention has been described and shown inonly a preferredembodiment thereof, it will be obvious that various modificationsthereof may occur to those skilled in the art without departing from thespirit or essential attributes ,thereof, and .it is desired thereforethat only such limitations be placed thereon as are specificallyset'forth in the appended claim.

What isv claimed is:

In combination with a fuel burner, an air register adapted for insertionthrough an opening in a furnace wall, said register including acylindrical. tunnel section of uniform outer diameter adapted to extendthrough said furnace wall, said tunnel section having detachablysecured. to the outer endthereof a cover, said cover including a controlmeans for controlling the amount of combustion supporting air .fiowablethrough said register, said-control means including a cylindricalsection-of said cover substantially equal in diameter to that of saidtunnel section with a set of openingstherein, a pair of radiallyextending guide flanges formed on the outside of said cylindricalsection adjacent the ends of said openings therein, a split cylindricalsleeve having a set of openings corresponding to those in thecylindrical section of-said cover, said split sleeve surrounding thecylindrical section of said cover having the openings therein, saidsleeve being rotatable about the axis of said cylindrical section andbetween 'said guide flanges whereby movement of said sleeve with respect-to said cylindrical section is effective to control the air throughboth of said sets of openings, means for joining the sides of said splitcylindrical sleeve to form a rigid sleeve, said last mentioned meansbeing adjustable to vary the diameter of said split sleeve, said coveralso ineludingan end section having at its center a sleeve-forsupporting on the inside thereof the burner tube, openings in said endsection, a

disc element abutting said end section and rotatableo'nsaid sleeve tobring openingstherein into and out of registry with those in said endsection.

H HUGH WIANT.

- REFERENCES CITED Thev following referenees are of record in the.UNI'IZEDfiTATES, PATENTS

